Perhaps you should try some spelling variations:
"sediment sampling algorithm" » "sediment mining algorithm" (Expand Search), "sediment samples algorithm" (Expand Search), "sediment sample algorithm" (Expand Search)
"element erf algorithm" » "element rf algorithm" (Expand Search), "element em algorithm" (Expand Search), "element lr algorithm" (Expand Search), "element ore algorithm" (Expand Search), "element mesh algorithm" (Expand Search)
"element rl algorithm" » "element rl algorithms" (Expand Search), "element rf algorithm" (Expand Search), "element ml algorithms" (Expand Search), "element ree algorithm" (Expand Search), "element ore algorithm" (Expand Search), "element _ algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("sediment sampling algorithm") OR ((("element erf algorithm") OR ("element rl algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"sediment sampling algorithm\") OR (((\"element erf algorithm\") OR (\"element rl algorithm\"))))".
• Removing quotes may allow a broader search: (( sediment sampling algorithm ) OR ((( element erf algorithm ) OR ( element rl algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("sediment sampling algorithm") OR ((("element erf algorithm") OR ("element rl algorithm"))))*.